Used as a curing agent and crosslinking promoter in polyurethane and epoxy resin systems, enhancing thermal stability and mechanical strength. Commonly applied in high-performance coatings, adhesives, and composite materials where durability and resistance to harsh environments are critical. Its spirocyclic structure contributes to low volatility and improved reactivity, making it suitable for use in aerospace, automotive, and electronic encapsulation applications. Also employed in specialty polymers requiring controlled rigidity and flexibility balance.